CN108827645A - The hydrocarbon discharge vaporization test method of fuel system - Google Patents
The hydrocarbon discharge vaporization test method of fuel system Download PDFInfo
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- CN108827645A CN108827645A CN201810259085.3A CN201810259085A CN108827645A CN 108827645 A CN108827645 A CN 108827645A CN 201810259085 A CN201810259085 A CN 201810259085A CN 108827645 A CN108827645 A CN 108827645A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
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Abstract
The invention discloses a kind of hydrocarbon discharge vaporization test methods of fuel system, and described method includes following steps：Test is rinsed to the hydrocarbon evaporative emissions system of regular fuel, with the normal volume for the flushing gas being rinsed；Standard oil filling pipe and hydrocarbon canister to be checked in a saturated state are connect with standard fuel tank respectively, are placed in the first closed box, the flushing gas of normal volume is passed through into canister to be checked, and carry out the first stewing process；When the nytron amount of substance in canister to be checked is less than or equal to the first preset quality value, oil filling pipe to be checked, pipeline to be checked and hydrocarbon canister to be checked in a saturated state are connect with to observation tank respectively；It is passed through the flushing gas of normal volume into canister to be checked, is placed in after carrying out the second stewing process in the second closed box；If the quality of hydrocarbon is less than standard quality value in the second closed box, the hydrocarbon discharge vaporization of fuel system is qualified.
Description
Technical field
The present invention relates to automobile technical fields, more particularly to a kind of hydrocarbon discharge vaporization test method of fuel system.
Background technique
With the rapid development of economy, the pollution of environment is increasingly severe, pollution emission control of the regulation for vehicle
All the more stringent, newest state six publishes in the test of IV type, and the hydrocarbon discharge vaporization of bicycle is down to 0.7g/24h by 2g/test before；
Wherein since hydrocarbon discharge vaporization fuel system contributes maximum, so, it needs to carry out the hydrocarbon discharge vaporization of fuel system tight
Lattice control.
Therefore it when developing tank assembly, needs to carry out fuel tank and the pipeline connecting with the fuel tank hydrocarbon
Discharge vaporization test, fuel tank, pipeline and its technique of hydrocarbon discharge vaporization qualification could be used as entire fuel system to meet carbon
The premise that hydrogen discharge vaporization requires.
In the prior art, the method for the detection hydrocarbon discharge vaporization numerical value of fuel system is usually by fuel tank, oil filling pipe at present
And the parts such as pipeline are put into a closed box simultaneously and are tested according to normal temperature circulation, to test out the carbon of fuel system
Whether hydrogen discharge vaporization is qualified, but in practical applications, and the working environment of fuel system is complicated, therefore only passes through simple temperature
Cyclic test does not ensure that the hydrocarbon discharge vaporization of the fuel system in actual automobilism is qualified.
Summary of the invention
In view of the above situation, it is necessary to for the hydrocarbon discharge vaporization that cannot accurately detect fuel system in the prior art
Problem provides a kind of hydrocarbon discharge vaporization test method of fuel system.
The present invention proposes a kind of hydrocarbon discharge vaporization test method of fuel system, is applied to a hydrocarbon evaporation of fuel oil to be detected
Exhaust system, the hydrocarbon evaporative emissions system of fuel oil to be detected include oil filling pipe to be detected, canister to be detected, pipeline to be detected and
Fuel tank to be detected, wherein described method includes following steps：
Test is rinsed to the hydrocarbon evaporative emissions system of regular fuel, with the standard for the flushing gas being rinsed
Volume；
Standard oil filling pipe and hydrocarbon canister to be checked in a saturated state are connect with standard fuel tank respectively, juxtaposition
After in the first closed box, being passed through the flushing gas of normal volume into the canister to be checked, and carry out the first stewing process, meter
Calculate the quality of hydrocarbon in the canister to be checked；
When the nytron amount of substance in the canister to be checked is less than or equal to the first preset quality value, by oiling to be checked
It manages, the canister to be checked that pipeline to be checked and hydrocarbon are in a saturated state is connect with to observation tank respectively；
It is passed through the flushing gas of the normal volume into the canister to be checked, is placed in the second closed box and carries out second
After stewing process, the quality of hydrocarbon in second closed box is calculated；
If the quality of hydrocarbon is less than standard quality value in second closed box, the fuel system is hydrocarbon
Discharge vaporization is qualified.
The hydrocarbon discharge vaporization test method of fuel system proposed by the present invention, first to the hydrocarbon discharge vaporization system of regular fuel
System carries out hydrocarbon discharge vaporization test, to obtain the flushing gas of normal volume；Then to the hydrocarbon discharge vaporization of fuel oil to be detected
Oil filling pipe to be checked, pipeline to be checked, canister to be checked in system and the hydrocarbon evaporation to each component progress part level such as observation tank
Emission test, to obtain each part to be checked of hydrocarbon discharge vaporization qualification, wherein in a saturated state to hydrocarbon
The canister to be checked the step of being rinsed in, the matter of hydrocarbon in the canister to be checked after completing to rinse can be made
Amount after carrying out the first stewing process still less than or equal to the first preset value, to ensure that the ability to work of the canister to be checked meets
It is required that；The hydrocarbon discharge vaporization that entire fuel system to be detected is carried out after finally each part of test passes is correspondingly connected with is surveyed
Examination, the hydrocarbon discharge vaporization accurately to determine fuel system to be detected is qualified, improves the hydrocarbon discharge vaporization of the fuel system
Reliability.
Further, the hydrocarbon discharge vaporization test method of the fuel system, wherein described to the hydrocarbon steaming of regular fuel
Send a manuscript to the compositor place system and be rinsed test, includes with the normal volume step for the flushing gas being rinsed：
One standard canister, standard pipeline and standard oil filling pipe are connect with the standard fuel tank respectively, it is close to be placed in first
After carrying out the static processing of third in closed box, the quality of hydrocarbon in first closed box is calculated, to obtain the first mass
Value；
After hydrocarbon in the standard canister is loaded onto saturation state, flushing is passed through into the standard canister
Gas is to be rinsed the hydrocarbon in the standard canister；
When in first closed box nytron amount of substance and the sum of the first mass value be equal to the first preset quality value
When, it records at this time by the volume of the flushing gas of the standard canister, to obtain the flushing gas of normal volume.
Further, the hydrocarbon discharge vaporization test method of the fuel system, wherein described into the canister to be checked
It is passed through the flushing gas of the normal volume, and the step of carrying out the second stewing process, which is placed in the second closed box, includes：
It, will be with the carbon to be checked to the fuel oil to which corresponding volume is added in observation tank under 23 ± 5 DEG C of environment of room temperature
Constant temperature is placed in observation tank, with the oil filling pipe to be checked and the pipeline to be checked connecting to observation tank described in tank connected
After 60 ± 0.5min of hot dipping in 38 ± 2 DEG C of second closed box, the flushing of the normal volume is passed through into the canister to be checked
Gas adjusts the temperature in second closed box to 20 ± 2 DEG C and stands 6~36h, if the canister to be checked is within the time
Quality no longer fluctuates, then adjusting the temperature range in second closed box is 20 DEG C~33 DEG C, and is incrementally ± 15 DEG C
Temperature be recycled to two round the clock.
Further, the hydrocarbon discharge vaporization test method of the fuel system, wherein keep the first closed box temperature
Degree adjusts the temperature in first closed box to 20 ± 2 DEG C and after standing 36h for 38 ± 2 DEG C and after continuing hot dipping 1h, adjusts
Temperature range in whole first closed box is 20 DEG C~33 DEG C, and incrementally carries out being recycled to two for ± 15 DEG C of temperature
Day is round the clock.
Further, the hydrocarbon discharge vaporization test method of the fuel system, wherein described to be placed in the first closed box
It carries out stewing process and is placed in the second closed box before the step of carrying out stewing process, the method also includes：To described
One closed box and second closed box are cleaned, so that hydrocarbonization in first closed box and second closed box
The concentration for closing object is lower than the default density.
Further, the hydrocarbon discharge vaporization test method of the fuel system, wherein described to be passed through rushing for normal volume
Gas washing body and the step of being passed through flushing gas include：
Corresponding flushing gas is passed through into the standard canister and the canister to be checked according to preset gas flow curve
The flushing gas of body and normal volume, the gas flow curve include the unit time with by the standard canister and it is described to
Examine the corresponding relationship of the flushing gas volume of canister.
Further, the hydrocarbon discharge vaporization test method of the fuel system, wherein the standard fuel tank, the mark
The volume for the fuel oil being added in quasi- oil filling pipe and the standard pipeline be respectively the standard fuel tank, the standard oil filling pipe and
The 40% of the standard manifold volume.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 is the flow chart for the hydrocarbon discharge vaporization test method of fuel system that first embodiment of the invention proposes；
Fig. 2 is the flow chart for the hydrocarbon discharge vaporization test method of fuel system that second embodiment of the invention proposes.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
Referring to following description and drawings, it will be clear that these and other aspects of the embodiment of the present invention.In these descriptions
In attached drawing, some particular implementations in the embodiment of the present invention are specifically disclosed, to indicate to implement implementation of the invention
Some modes of the principle of example, but it is to be understood that the scope of embodiments of the invention is not limited.On the contrary, of the invention
Embodiment includes all changes, modification and the equivalent fallen within the scope of the spirit and intension of attached claims.
Referring to Fig. 1, for the hydrocarbon discharge vaporization test method of fuel system in first embodiment of the invention, wherein packet
Include step S11~S15.
Step S11 is rinsed test to the hydrocarbon evaporative emissions system of regular fuel, with the flushing gas being rinsed
The normal volume of body.
As described above, each standardized element of required test in the fuel system is correspondingly connected with, to the institute after being correspondingly connected with
The fuel oil for being put into normal volume in standardized element is stated, flushing gas is passed through into the standardized element for being put into normal volume fuel oil
Body, to be cleaned to the hydrocarbon in the standardized element, when the quality drop of hydrocarbon in the standardized element
When down to preset value, record at this time by the volume of the flushing gas of the standardized element, then at this time by the standard zero
The volume of flushing gas in part is the flushing gas of normal volume.
Wherein, the standardized element is that the standard canister, standard pipeline of test passes, standard are refueled in the fuel system
Pipe and standard fuel tank.Preferably, before the step of being cleaned to the hydrocarbon in the standardized element, need to make described
Hydrocarbon in standardized element is in a saturated state, but not limited to this, in other embodiments in the standardized element
Hydrocarbon can not also place and saturation state.It should be understood that when the quality of the hydrocarbon in the standardized element
When being reduced to preset value, the volume of obtained flushing gas is the flushing gas of normal volume, and the preset value can be through
It crosses test to be determined with analysis or empirical value, herein with no restrictions.
Step S12, by standard oil filling pipe and hydrocarbon canister to be checked in a saturated state respectively with standard fuel tank
Connection, is placed in the first closed box, and the flushing gas of normal volume is passed through into the canister to be checked, and carries out first and stand
After processing, the quality of hydrocarbon in the canister to be checked is calculated.
As described above, by standard oil filling pipe and the hydrocarbon canister to be checked in a saturated state respectively with it is described
Standard fuel tank is correspondingly connected with, and the standard oil filling pipe, the canister to be checked and the standard fuel tank after being correspondingly connected with are set
In being rinsed in the first closed box with after the first stewing process, the quality of hydrocarbon in the canister to be checked is calculated.
When it is implemented, the standard oil filling pipe, the canister to be checked and the standard fuel tank after being correspondingly connected with are set
Before the step of carrying out the first stewing process in the first closed box, also need to clean first closed box, so that institute
The concentration of the hydrocarbon in the first closed box is stated lower than the default density.Preferably, hydrocarbon in first closed box
The concentration of compound should be lower than 500ppm, and wherein 500ppm is according to multiple test and analysis gained, to avoid described first
The excessive concentration of the hydrocarbon in closed box, and make the quality of nytron in the canister to be checked finally measured
There is biggish error, but not limited to this, the concentration of the hydrocarbon in first closed box is also in other embodiments
It can be other values.
Further, the standard oil filling pipe, the canister to be checked and storage after being correspondingly connected with have corresponding volume combustion
The standard fuel tank of oil is placed in the first closed box the method for carrying out the first stewing process：By first closed box
Interior temperature is adjusted to 38 ± 2 DEG C and continues 1h, so that the standard oil filling pipe, the canister to be checked and institute after being correspondingly connected with
State standard fuel tank 38 ± 2 DEG C at a temperature of continue hot dipping 1h.
After hot dipping 1h, adjusts the temperature in first closed box and be 20 DEG C and continue 36h, so as to be correspondingly connected with
The standard oil filling pipe, the canister to be checked and the standard fuel tank afterwards 20 ± 2 DEG C at a temperature of persistently stand 36h.
Adjusting the temperature in first closed box is 38 DEG C, carries out energization fortune to the oil pump being located in the standard fuel tank
It is powered off after row 40min, wherein during being powered to the oil pump, according to the corresponding pre-set gas flow curve
The flushing gas of normal volume is passed through into the canister to be checked, with pair the canister to be checked in hydrocarbon carry out
The cleaning of 40min.
After carrying out the cleaning of 40min, adjusting the temperature range in first closed box is 20 DEG C~33 DEG C, and
Incrementally be recycled to two round the clock for ± 15 DEG C of temperature, so that the standard oil filling pipe after being correspondingly connected with, described
Canister to be checked and the standard fuel tank persistently stand two round the clock under the temperature cycles of ± 15 DEG C of (20 DEG C~33 DEG C).Exist simultaneously
The variation of the canister nytron amount of substance to be checked under corresponding temperature and time is monitored during first stewing process, and
Calculate the quality of the hydrocarbon in the canister to be checked after the first stewing process.Wherein hydrocarbonization in the canister to be checked
The quality for closing object can be measured by electronic scale or corresponding loading component, be those skilled in the art's conventional techniques,
It will not go into details for this.
Specifically, the volume of the fuel oil is the 40% of the standard volume of fuel tank, mark is passed through into the canister to be checked
When the flushing gas of quasi- volume, carried out according to the corresponding pre-set gas flow curve, wherein the pre-set gas flow is bent
Line includes the unit time, and passes through the body of the standard canister and the flushing gas of the canister to be checked in the corresponding unit time
Product.Preferably, the flushing gas of the normal volume and the corresponding pre-set gas flow curve are according to multiple survey
It is obtained after examination and analysis, so that the process cleaned to hydrocarbon in the canister to be checked and practical garage
Cleaning state consistency is carried out to hydrocarbon during sailing.But not limited to this, the normal volume in other embodiments
Flushing gas and the corresponding pre-set gas flow curve can also rule of thumb.It should be understood that corresponding institute
Stating pre-set gas flow curve can may be straight line for curve, herein with no restrictions.
At the same time, in other embodiments, the standard oil filling pipe, the canister to be checked and institute after being correspondingly connected with
The standard fuel tank of stating is placed in the first closed box the method for carrying out the first stewing process：By the temperature in first closed box
After degree is adjusted to 38 DEG C and continues 1h；The temperature in first closed box is adjusted to be 20 DEG C and continue 36h；Carrying out 36h's
After stewing process, adjusting the temperature in first closed box is 20~30 DEG C, and is incrementally carried out for ± 15 DEG C of temperature
It is recycled to two round the clock.Calculate the matter of the canister to be checked hydrocarbon in the canister to be checked after the first stewing process
Amount.
At the same time, in other embodiments, the standard oil filling pipe, the canister to be checked and institute after being correspondingly connected with
The standard fuel tank of stating is placed in the first closed box the method for carrying out the first stewing process：It will be in first closed box
Temperature is adjusted to constant temperature, so that the standard oil filling pipe, the canister to be checked and the standard fuel tank after should connecting are in temperature
The first stewing process of Time constant is carried out in the first constant closed box.The wherein temperature and first in first closed box
The time of stewing process can be configured according to the result or empirical value of test and analysis, herein with no restrictions.
It should be understood that the quality of hydrocarbon is in the canister to be checked obtained after first stewing process：
The quality of hydrocarbon is subtracted and is rushed in the canister to be checked when hydrocarbon is in a saturated state in the canister to be checked
After the quality for the hydrocarbon washed, along with rinse and the first stewing process during the canister to be checked absorbed it is hydrocarbon
The quality of compound.Described the step of carrying out the first stewing process is the ability to work in order to verify the canister to be checked, thus
Obtain the canister to be checked of ability to work qualification.
Step S13 will when the nytron amount of substance in the canister to be checked is less than or equal to the first preset quality value
Oil filling pipe to be checked, pipeline to be checked and the hydrocarbon canister to be checked in a saturated state are connect with to observation tank respectively.
As described above, when being passed through normal volume into the hydrocarbon canister to be checked in a saturated state
After flushing gas and the first stewing process of progress, it is default to be less than or equal to first for the quality of hydrocarbon in the canister to be checked
When mass value, then show that the ability to work of the canister to be checked is qualified.By the carbon in the canister to be checked of ability to work qualification
Hydrogen compound is loaded onto after saturation state again and oil filling pipe to be checked, pipeline to be checked are respectively corresponded and connect with to observation tank, with into
The hydrocarbon discharge vaporization test of the row fuel system to be detected.
It should be understood that the first preset quality value is according to multiple test and analysis gained, described in verifying
The ability to work of canister to be checked, but not limited to this, in other embodiments first preset value can based on experience value gained.
Step S14 is passed through the flushing gas of the normal volume into the canister to be checked, is placed in the second closed box
After carrying out the second stewing process, the quality of hydrocarbon in second closed box is calculated.
Step S15, if the quality of hydrocarbon is less than standard quality value in second closed box, the fuel oil
The hydrocarbon discharge vaporization of system is qualified.
As described above, by oil filling pipe to be checked, pipeline to be checked and the hydrocarbon canister to be checked in a saturated state
It is correspondingly connected with respectively with to observation tank, and the oil filling pipe to be checked after being correspondingly connected with, the canister to be checked and described to be checked
Fuel tank is placed in the second closed box, after being passed through the flushing gas of the normal volume and carrying out the second stewing process, described in calculating
The quality of hydrocarbon in second closed box.
When it is implemented, the oil filling pipe to be checked, the canister to be checked after being correspondingly connected with and described being set to observation tank
Before the step of carrying out the second stewing process in the second closed box, also need to clean second closed box, so that institute
The concentration of the hydrocarbon in the second closed box is stated lower than the default density.Preferably, hydrocarbon in second closed box
The concentration of compound should be lower than 500ppm.
Further, the oil filling pipe to be checked after being correspondingly connected with, the canister to be checked, the pipeline to be checked and
It is described to be placed in the second closed box the method for carrying out the first stewing process to observation tank and be：Preferably, in 23 DEG C of rings of room temperature
It, will be in second temperature circulation to 40% fuel oil to which the volume of fuel tank to be checked is added in observation tank under border
Temperature is adjusted to 38 ± 2 DEG C and continues 60 ± 0.5min, so that the oil filling pipe to be checked, the carbon to be checked after being correspondingly connected with
Tank, the pipeline to be checked and it is described to observation tank 38 ± 2 DEG C at a temperature of continue 60 ± 0.5min of hot dipping.
After 60 ± 0.5min of hot dipping, adjusts the temperature in second closed box and be 20 DEG C and continue 6h, so that
The oil filling pipe to be checked, the canister to be checked after being correspondingly connected with and it is described to observation tank 20 ± 2 DEG C at a temperature of continue it is quiet
Set 6~36h.
If the quality of the canister to be checked no longer fluctuates within the time, the temperature adjusted in second closed box is
It 38 DEG C, is powered off after the oil pump in observation tank carries out being powered operation 45min to positioned at described, wherein being led to the oil pump
In the process of electricity, the flushing gas of normal volume is passed through into the canister to be checked according to the corresponding pre-set gas flow curve
Body can refer to step S11 and carry out hydrocarbon to carry out the cleaning of 45min to the hydrocarbon in the canister to be checked
Cleaning, it will not be described here.
It should be understood that running 45min and according to correspondence to be powered to the oil pump in observation tank described in
Pre-set gas flow curve the step of being passed through the flushing gas of normal volume into the canister to be checked, and to being located at
The oil pump in the standard fuel tank be powered operation 40min and according to the corresponding pre-set gas flow curve to institute
In the step of stating the flushing gas for being passed through normal volume in canister to be checked, the pre-set gas flow curve is different curve,
But not limited to this, it in other embodiments can be same curves.
After carrying out the cleaning of 45min, adjusting the temperature in first closed box is 27 DEG C, and is incrementally
± 15 DEG C of temperature be recycled to two round the clock so that the oil filling pipe to be checked, the canister to be checked after being correspondingly connected with and
It is described persistently to stand two round the clock under the temperature cycles of ± 15 DEG C of (20 DEG C~33 DEG C) to observation tank.Simultaneously at the second standing
The variation of the canister nytron amount of substance to be checked under corresponding temperature and time is monitored during reason, and is calculated described
The quality of canister to be checked hydrocarbon in the canister to be checked after the second stewing process.If hydrocarbonization in the canister to be checked
When closing the quality of object less than standard quality value, then the hydrocarbon discharge vaporization of the fuel system to be detected is qualified.
In practical applications, if the quality of hydrocarbon is the 80% of standard quality value in the canister to be checked, table
The bright entire hydrocarbon discharge vaporization of fuel system to be detected is qualified, herein only preferably, existing to avoid the fuel system
There is the hydrocarbon raised situation of discharge vaporization amount due to the aging of system after prolonged operation, but not limited to this, at other
The quality of hydrocarbon can also be equal to the standard quality value in canister to be checked described in embodiment.
Further, during the test, when the hydrocarbon discharge vaporization of fuel system to be detected is unqualified, Ke Yitong
The volume for increasing and being passed through flushing gas in presently described canister to be checked is crossed, until hydrocarbon in presently described canister to be checked
Quality be less than or equal to standard quality value when record at this time by it is described currently canister to be checked flushing gas volume, using as
The flushing gas of the normal volume of current fuel system.
At the same time, in other embodiments, the oil filling pipe to be checked after being correspondingly connected with, the canister to be checked, institute
It states pipeline to be checked and described be placed in the second closed box the method for carrying out the second stewing process to observation tank and can be：In room temperature
Under 23 DEG C of environment, to 40% fuel oil to which the volume of fuel tank to be checked is added in observation tank, the second temperature is followed
After temperature in ring is adjusted to 40 DEG C and continues 60min；The temperature in second closed box is adjusted to be 22 DEG C and continue 21h；
If the canister to be checked quality within the time no longer fluctuates, adjusting the temperature in second closed box is 20~33 DEG C,
And be incrementally recycled to two round the clock for ± 15 DEG C of temperature.Second closed box is calculated in the second stewing process
Afterwards in second closed box hydrocarbon quality.
It should be understood that the quality of hydrocarbon is hydrocarbon in the canister to be checked in second closed box
The quality of hydrocarbon subtracts the quality of rinsed hydrocarbon in the canister to be checked when in a saturated state, in addition
After rinsing the quality of the hydrocarbon absorbed with the canister to be checked during the second stewing process, described second is added
Oil filling pipe, the pipeline to be checked and the fuel oil volatilization in observation tank to be checked in closed box are to described second closed
The concentration of hydrocarbon in case finally carries out processing again and calculates gained.Therefore, nytron in second closed box
The quality of object is the hydrocarbon evaporation capacity of the entire fuel system to be detected, so as to accurately determine fuel system to be detected
Whether hydrocarbon discharge vaporization is qualified, improves the reliability of the hydrocarbon discharge vaporization of the fuel system.
Wherein, oil filling pipe to be checked, pipeline to be checked and the hydrocarbon canister to be checked in a saturated state are distinguished
Be correspondingly connected with to observation tank be placed in the second closed box be rinsed and the second stewing process during, real-time monitoring institute
The quality for stating hydrocarbon in the second closed box becomes, to judge the environment and the mark of second closed box in this time
Whether the performance of quasi- canister is normal.
At the same time, in other embodiments, the oil filling pipe to be checked after being correspondingly connected with, the canister to be checked, institute
It states pipeline to be checked and described be placed in the second closed box the method for carrying out the second stewing process to observation tank and can be：It will be described
Temperature in second closed box is adjusted to constant temperature so that the oil filling pipe to be checked after should connecting, the canister to be checked, it is described to
Examine pipeline and second stewing process for carrying out Time constant in the second constant closed box of temperature to observation tank.Wherein
The time of temperature and the second stewing process in second closed box can be according to the result or empirical value of test and analysis
It is configured, herein with no restrictions.
It should be understood that the standard quality value is according to state's six regulations gained, for verifying the carbon of the fuel system
Whether hydrogen discharge vaporization is qualified, but not limited to this, the standard quality value can be according to test gained in other embodiments.This
In embodiment, when the quality of hydrocarbon in the canister to be checked is the 80% of standard quality value, then the fuel system
Hydrocarbon discharge vaporization is qualified, hydrocarbon steaming occurs due to the aging of system after prolonged operation to avoid the fuel system
Send a manuscript to the compositor high-volume raised situation.
The hydrocarbon discharge vaporization test method of fuel system proposed by the present invention, first to the hydrocarbon discharge vaporization system of regular fuel
System carries out hydrocarbon discharge vaporization test, to obtain the flushing gas of normal volume；Then to the hydrocarbon discharge vaporization of fuel oil to be detected
Oil filling pipe to be checked, pipeline to be checked, canister to be checked in system and the hydrocarbon evaporation to each component progress part level such as observation tank
Emission test, to obtain each part to be checked of hydrocarbon discharge vaporization qualification, wherein in a saturated state to hydrocarbon
The canister to be checked the step of being rinsed in, the matter of hydrocarbon in the canister to be checked after completing to rinse can be made
Amount after carrying out the first stewing process still less than or equal to the first preset value, to ensure that the ability to work of the canister to be checked meets
It is required that；The hydrocarbon discharge vaporization that entire fuel system to be detected is carried out after finally each part of test passes is correspondingly connected with is surveyed
Examination, the hydrocarbon discharge vaporization accurately to determine fuel system to be detected is qualified, improves the hydrocarbon discharge vaporization of the fuel system
Reliability.
Referring to Fig. 2, for the hydrocarbon discharge vaporization test method of fuel system in second embodiment of the invention, including step
S21~S27.
One standard canister, standard pipeline and standard oil filling pipe are connect with standard fuel tank by step S21 respectively, are placed in
After carrying out the static processing of third in one closed box, the quality of hydrocarbon in first closed box is calculated, to obtain first
Mass value.
As a specific embodiment, by standard canister, standard pipeline and standard oil filling pipe respectively with standard fuel tank
Connection is placed in front of first closed box, the method also includes：By the open container equipped with 5L fuel oil as described the
In one closed box, until taking out when the concentration of hydrocarbon is more than 500ppm in first closed box equipped with 5L fuel oil
Open container, and 7 minutes purgings are carried out to first closed box, while detecting in 7 minutes carbon in first closed box
The situation of change of hydrocarbon concentration, if in first closed box hydrocarbon concentration be reduced in 7 minutes 15ppm with
Under, then first closed box is qualified.It should be understood that the method for the judgement first closed box can also be applied to it is upper
In one embodiment the second closed box whether He Ge judgement.
When it is implemented, by the standard canister, the standard pipeline and the standard oil filling pipe respectively with the standard
Fuel tank is correspondingly connected with the method for being placed on and carrying out third stewing process in the first closed box：
It is put into 40% fuel oil of the standard volume of fuel tank into the standard fuel tank, will be connect with the standard canister
The standard fuel tank, and the standard oil filling pipe connecting with the standard fuel tank and the standard pipeline be placed in temperature and be
In 38 ± 2 DEG C of first closed box and after continuing hot dipping 1h, the temperature in first closed box is adjusted to 20 ± 2 DEG C
And after standing 36h, adjusting the temperature range in first closed box is 20 DEG C~33 DEG C, and is incrementally ± 15 DEG C of temperature
Degree be recycled to two round the clock, to carry out third stewing process, while monitoring the mark during third stewing process
The variation of quasi- canister nytron amount of substance determines the quality of hydrocarbon in the standard canister in the corresponding period, with
Judge whether the performance of the environment of first closed box and the standard canister is normal in this time, finally calculates
After three stewing process in first closed box hydrocarbon quality, to obtain the first mass value.
First mass value described in the present embodiment is repeatedly test gained, but not limited to this, it is described in other embodiments
First mass value can also be empirical value.It should be understood that first mass value is nytron in first closed box
The quality of object, the hydrocarbon discharge vaporization summation in the as described hydrocarbon evaporative emissions system of regular fuel.
Step S22, after the hydrocarbon in the standard canister is loaded onto saturation state, into the standard canister
Flushing gas is passed through to be rinsed to the hydrocarbon in the standard canister.
Step S23, when in first closed box nytron amount of substance and the sum of the first mass value to be equal to first pre-
If when mass value, recording at this time by the volume of the flushing gas of the standard canister, to obtain the flushing gas of normal volume
Body.
As described above, by the carbon in the standard canister being correspondingly connected in first closed box with the standard fuel tank
After hydrogen compound is loaded onto saturation state, flushing gas is passed through into the standard canister to hydrocarbon in the standard canister
Compound is rinsed, until the sum of the nytron amount of substance and the first mass value in first closed box are equal to first in advance
If when mass value, stopping the cleaning to hydrocarbon in the standard canister, record passes through the standard canister at this time
The volume of flushing gas, to obtain the flushing gas of normal volume.
It should be understood that be passed through into the standard canister flushing gas of normal volume with to the hydrocarbon into
Row rinse amount be：The reduction amount of hydrocarbon in the hydrocarbon standard canister in a saturated state, in addition punching
After washing the quality of the hydrocarbon absorbed with standard canister described during third stewing process, along with described the with close
The standard oil filling pipe, the standard pipeline in closed box and the fuel oil volatilization in the standard fuel tank are to described with closed box
The concentration of interior hydrocarbon is finally handled and is calculated again.To obtain the normal volume flushing gas and be rushed
Relationship between the quality for the hydrocarbon washed, to ensure that the hydrocarbon discharge vaporization amount of the fuel system to be detected conforms to
It asks.Wherein, the relationship between the normal volume flushing gas and the quality of the hydrocarbon rinsed can be by multiple
Obtained by test analysis.
Specifically, the temperature in adjustment first closed box is 38 DEG C, to the oil pump being located in the standard fuel tank into
It is powered off after row energization operation 45min, wherein during being powered to the oil pump, according to the corresponding pre-set gas
Flow curve is passed through flushing gas into the standard canister, with pair the standard canister in hydrocarbon carry out
The cleaning of 45min can refer to the cleaning that an embodiment carries out hydrocarbon, and it will not be described here.It is wherein described to being located at
The oil pump in standard fuel tank carry out be powered operation 45min time be according in six regulation of state automobile carry out low speed, middling speed,
At a high speed, the time of high speed and be arranged, but not limited to this, the oil pump pair being located at described in the other embodiments in the standard fuel tank
The time for carrying out energization operation can also be obtained by test analysis or empirical value.
Wherein, according to the corresponding pre-set gas flow curve to described to be passed through flushing gas in standard can, with right
The standard canister in hydrocarbon carry out 45min cleaning；With it is described to the oil pump in observation tank to being located at
The operation 45min that is powered is carried out, and standard body is passed through into the canister to be checked according to the corresponding pre-set gas flow curve
In the step of long-pending flushing gas, the pre-set gas flow curve is identical curve, but not limited to this, in other embodiments
In can be different curves.
As a specific embodiment, flushing gas can be separately or concurrently passed through to multiple standard canisters, when right
The sum of remaining nytron amount of substance and the first mass value are equal to the first preset quality value in first closed box answered
When, then it records at this time by the volume of the flushing gas of the corresponding standard canister, according to the flushing gas being passed through
Volume the standard canister is divided at least one set, determine every group described in the minimum of flushing gas that is passed through needed for standard canister
Value can satisfy carbon remaining in first closed box with standard canister described in ensuring every group under the flushing gas
The sum of hydrogen compound quality and the first mass value are equal to the condition of the first preset quality value.It should be understood that the normal volume
Flushing gas be equal to every group described in the minimum value of flushing gas is passed through needed for standard canister.
Wherein, the standard fuel tank, the standard oil filling pipe and the standard pipeline can lead to following method and obtain：
It is the oil to be checked by multiple volumes to be respectively put into fuel oil in observation tank, oil filling pipe to be checked and pipeline to be checked
40% fuel oil of case, the oil filling pipe to be checked and the manifold volume to be checked, and being respectively placed in corresponding temperature is 40
DEG C third closed box in storage 20 weeks after, calculate the quality and difference of hydrocarbon in the corresponding third closed box
It is compared with corresponding object hydrocarbon discharge amount；When it is described to observation tank, the oil filling pipe to be checked and described to be checked
The hydrocarbon emission amount of pipeline is identical as the corresponding object hydrocarbon discharge amount, then will it is corresponding it is described to
Observation tank, the oil filling pipe to be checked and the pipeline to be checked are respectively as the standard fuel tank, the standard oil filling pipe and described
Standard pipeline.It is any described to nytron corresponding to observation tank, the oil filling pipe to be checked and the pipeline to be checked if it exists
The quality of object is different from the object hydrocarbon discharge amount, then replaces next to observation tank, oil filling pipe to be checked and pipe to be checked
Road is tested, until obtain qualified described of hydrocarbon emission amount to observation tank, the oil filling pipe to be checked and it is described to
Pipeline is examined as the standard fuel tank, the standard oil filling pipe and the standard pipeline.
Step S24, by standard oil filling pipe and hydrocarbon canister to be checked in a saturated state respectively with standard fuel tank
Connection, is placed in the first closed box, and the flushing gas of normal volume is passed through into the canister to be checked, and carries out first and stand
After processing, the quality of hydrocarbon in the canister to be checked is calculated.
Step S25 will when the nytron amount of substance in the canister to be checked is less than or equal to the first preset quality value
Oil filling pipe to be checked, pipeline to be checked and the hydrocarbon canister to be checked in a saturated state are connect with to observation tank respectively.
Step S26 is passed through the flushing gas of the normal volume into the canister to be checked, is placed in the second closed box
After carrying out the second stewing process, the quality of hydrocarbon in second closed box is calculated.
Step S27, if the quality of hydrocarbon is less than standard quality value in second closed box, the fuel oil
The hydrocarbon discharge vaporization of system is qualified.
As described above, being carried out whole after by the canister to be checked of the test of part level to obtain ability to work qualification
A hydrocarbon discharge vaporization test of fuel oil to be checked, the hydrocarbon discharge vaporization system of fuel oil to be checked to obtain hydrocarbon discharge vaporization test passes
System.
The present embodiment further perfect hydrocarbon discharge vaporization test method of fuel system on the basis of second embodiment,
Improve practicability.
It should be noted that the present embodiment stressed is difference with a upper embodiment, between each embodiment
The non-repeated description in same and similar part, can be with cross-reference, and the technical characteristic between each embodiment can be according to this field
The conventional technical means of technical staff carries out selective combination.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (7)
- It, should 1. a kind of hydrocarbon discharge vaporization test method of fuel system is applied to a hydrocarbon evaporative emissions system of fuel oil to be detected The hydrocarbon evaporative emissions system of fuel oil to be detected includes oil filling pipe, canister to be detected, pipeline to be detected and fuel tank to be detected to be detected, It is characterized in that, described method includes following steps：Test is rinsed to the hydrocarbon evaporative emissions system of regular fuel, with the standard body for the flushing gas being rinsed Product；Standard oil filling pipe and hydrocarbon canister to be checked in a saturated state are connect with standard fuel tank respectively, are placed in In one closed box, it is passed through the flushing gas of normal volume into the canister to be checked, and after the first stewing process of progress, calculates institute State the quality of hydrocarbon in canister to be checked；When the nytron amount of substance in the canister to be checked be less than or equal to the first preset quality value when, by oil filling pipe to be checked, Pipeline and the hydrocarbon to be checked canister to be checked in a saturated state are connect with to observation tank respectively；It is passed through the flushing gas of the normal volume into the canister to be checked, is placed in the second closed box and carries out the second standing After processing, the quality of hydrocarbon in second closed box is calculated；If the quality of hydrocarbon is less than standard quality value in second closed box, the hydrocarbon evaporation of fuel system Discharge is qualified.
- 2. the hydrocarbon discharge vaporization test method of fuel system according to claim 1, which is characterized in that described to be fired to standard Oil carbon hydrogen evaporative emissions system is rinsed test, includes with the normal volume step for the flushing gas being rinsed：One standard canister, standard pipeline and standard oil filling pipe are connect with the standard fuel tank respectively, are placed in the first closed box After the static processing of interior progress third, the quality of hydrocarbon in first closed box is calculated, to obtain the first mass value；After hydrocarbon in the standard canister is loaded onto saturation state, flushing gas is passed through into the standard canister To be rinsed to the hydrocarbon in the standard canister；When in first closed box nytron amount of substance and the sum of the first mass value be equal to the first preset quality value when, note Record is at this time by the volume of the flushing gas of the standard canister, to obtain the flushing gas of normal volume.
- 3. the hydrocarbon discharge vaporization test method of fuel system according to claim 1, which is characterized in that it is described to it is described to It is passed through the flushing gas of the normal volume in inspection canister, is placed in the second closed box the step of carrying out the second stewing process packet It includes：Under 23 ± 5 DEG C of environment of room temperature, to the fuel oil to which corresponding volume is added in observation tank, it will connect with the canister to be checked The constant temperature that is placed in observation tank, with the oil filling pipe to be checked and the pipeline to be checked connecting to observation tank connect is 38 In ± 2 DEG C of second closed box after 60 ± 0.5min of hot dipping, the flushing gas of the normal volume is passed through into the canister to be checked, The temperature in second closed box is adjusted to 20 ± 2 DEG C and stands 6~36h, if the canister to be checked quality within the time It no longer fluctuates, then adjusting the temperature range in second closed box is 20 DEG C~33 DEG C, and is incrementally ± 15 DEG C of temperature Degree be recycled to two round the clock.
- 4. the hydrocarbon discharge vaporization test method of fuel system according to claim 2, which is characterized in thatAfter keeping the first closed box temperature to be 38 ± 2 DEG C and continue hot dipping 1h, by the temperature tune in first closed box Whole to 20 ± 2 DEG C and after standing 36h, adjusting the temperature range in first closed box is 20 DEG C~33 DEG C, and incrementally Be recycled to two round the clock for ± 15 DEG C of temperature.
- 5. the hydrocarbon discharge vaporization test method of fuel system according to claim 1, which is characterized in that described to be placed in first The first stewing process is carried out in closed box and is placed in the second closed box before the step of carrying out the second stewing process, the method Further include：First closed box and second closed box are cleaned, so that first closed box and described second The concentration of hydrocarbon in closed box is lower than the default density.
- 6. the hydrocarbon discharge vaporization test method of fuel system according to claim 2, which is characterized in that described to be passed through standard The flushing gas of volume and the step of being passed through flushing gas include：Corresponding flushing gas is passed through into the standard canister and the canister to be checked according to corresponding pre-set gas flow curve The flushing gas of body and normal volume, the gas flow curve include the unit time with by the standard canister and it is described to Examine the corresponding relationship of the flushing gas volume of canister.
- 7. the hydrocarbon discharge vaporization test method of fuel system according to claim 1, which is characterized in that the standard oil The volume for the fuel oil being added in case, the standard oil filling pipe and the standard pipeline is respectively the standard fuel tank, the mark The 40% of quasi- oil filling pipe and the standard manifold volume.
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| CN115045779A (en) * | 2022-07-15 | 2022-09-13 | 江铃汽车股份有限公司 | Experimental method and system for detecting hydrocarbon evaporation emission in refueling process |
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